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Fully-Integrated Electrochromic-OLED Devices for Highly Transparent Smart Glasses

Abstract

The integration of energy-saving electrochromic systems with novel functions and features in a single smart multifunctional device promises to achieve remarkable technological advancements for a wide range of consumer products showing more versatility, responsivity to different external inputs, and ability to operate in interactive modes. Here, we report a novel architecture in which a solid-state electrochromic cell and a solid-state organic light emitting diode are fully integrated in a single, highly transparent, solid-state electrochromic OLED device. This multifunctional device is capable to tune its optical properties such as transmittance (chromic transition), and to produce light by electroluminescence, simultaneously or independently. The rational design of solid-state electrochromic cell and highly transparent OLED enables the construction of the integrated device in a monolithic unit. In such a structure the photonic architecture of OLED device not only guarantees high transmittance, but, operating synergically with the electrochromic component, outperforms the optical properties and electrochromic responses by interference phenomena, allowing for optical contrast of 57% (ΔTbleaching/colouring @ 650nm), coloration efficiency of 169 cm2/C, very low energy consumed (80 mW/cm2). OLED component exhibits luminance above the minimum required for display and lighting applications, 300 cd/m2 and above 800 cd/m2, respectively. This result represents a further step towards the developments of next-generation multifunctional EC devices potentially exploitable for a wide range of applications, spanning from energy-efficient building, wearable devices, head-up displays to low-power smart glasses and transparent OLED displays.

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Publication details

The article was received on 09 Apr 2018, accepted on 14 Jun 2018 and first published on 14 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC01665H
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Fully-Integrated Electrochromic-OLED Devices for Highly Transparent Smart Glasses

    P. Cossari, M. Pugliese, S. GAMBINO, A. Cannavale, V. Maiorano, G. Gigli and M. Mazzeo, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01665H

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